For the Spanish sculptor, see Pilar Calvo Rodero. Maria Pilar Calvo i Gómez (born 3 May 1963) is a Spanish journalist, politician and a member of the Congress of Deputies of Spain. Early life Calvo
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e6e176ce5d92544391c563d9b2495fabccfb7c0f4f4e9b34ff2a1ca7fec0b5. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eb9fa5f-b8e6-4cc7-8cd8-5b39df912389.json and https://artists.proofprofile.net/proofs/artist/0eb9fa5f-b8e6-4cc7-8cd8-5b39df912389.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).